JEQ
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
 QUICK SEARCH:   [advanced]


     


Published online 27 October 2006
Published in J Environ Qual 35:2352-2359 (2006)
DOI: 10.2134/jeq2005.0478
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Abstract Freely available
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gustin, M. S.
Right arrow Articles by Donaldson, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gustin, M. S.
Right arrow Articles by Donaldson, S.
Agricola
Right arrow Articles by Gustin, M. S.
Right arrow Articles by Donaldson, S.
Related Collections
Right arrow Wetlands and Aquatic Processes
Right arrow Biogeochemical Processes
Right arrow Heavy Metals

Evaluation of Wetland Methyl Mercury Export as a Function of Experimental Manipulations

Mae Sexauer Gustina,*, Prithviraj V. Chavanb, Keith E. Dennettb, Eric A. Marchandb and Susan Donaldsonc

a Dep. of Natural Resources and Environmental Sciences, Univ. of Nevada, Reno, NV 89557
b Dep. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV 89557
c Nevada Cooperative Extension, Reno, NV 89520


Figure 1
View larger version (27K):

[in a new window]
 
Fig. 1. Schematic showing the experimental designs for constructed wetland mesocosms used for this study. Paired mesocosms used for the manipulations are indicated by common labeling. In most cases one of the paired mesocosms was used as a control and the other manipulated.

 

Figure 2
View larger version (11K):

[in a new window]
 
Fig. 2. The {Delta}C MeHg (outlet-inlet concentrations) in water before and after drying and subsequent rewetting. Control mesocosm (CM) indicates data in which flow was maintained over the course of the manipulation and manipulated mesocosm (MM) data for which flow was stopped and the wetlands allowed to dry. The {Delta}C TSS (outlet-inlet) indicates total suspended solids concentration.

 

Figure 3
View larger version (9K):

[in a new window]
 
Fig. 3. The {Delta}C MeHg (outlet-inlet) concentration in water before and after drying over the winter and during resumed flow after subsequent rewetting in the spring. The left panel is data from the mesocosms with contaminated water and the right panel from those with clean water. Open bars represent mesocosms with contaminated sediments and those with dark bars represent clean sediments.

 

Figure 4
View larger version (8K):

[in a new window]
 
Fig. 4. The {Delta}C MeHg concentrations in water before, during, and after the sulfate addition. Sulfate was added to mesocosms with clean water influent and Hg-contaminated sediments (left panel) and clean sediments (right panel). CM indicates the control mesocosm, whereas MM indicates data from the manipulated mesocosm.

 

Figure 5
View larger version (9K):

[in a new window]
 
Fig. 5. The {Delta}C MeHg in water between the mesocosm outlet and inlet prior, during, and after (Day 63) nitrate addition for designs with clean water and Hg-contaminated sediments (left side) and clean sediments (right side).

 

Figure 6
View larger version (9K):

[in a new window]
 
Fig. 6. The {Delta}C sulfate concentration (inlet minus outlet) and {Delta}C dissolved methyl mercury (MeHgD) (outlet minus inlet) concentration for all data collected during this study.

 





HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education
Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.